GROCO Bronze In-Line Check Valve 3/4". 3/4" Bronze In-Line Check Valve Specifications for GROCO 3/4" Bronze In-Line Check Valve: Manufacturer: GROCO Color: Black Features of GROCO 3/4" Bronze In-Line Check Valve C83600 cast bronze construction NPT threaded ports 1/2" - 2" sizes Suitable for use with diesel fuel or gasoline Package Contents: GROCO 3/4" Bronze In-Line Check Valve GROCO CV-75: Bronze In-Line Check Valve 3/4"